Some of the biggest problems in the U.S. are in Jefferson County, Ala. The municipality is plagued with corruption, debt and an infrustructur nightmare. We take a look.   In Libya, Col. Moammar Gadhafi continues to attack protesters in his country. A paramilitary force led by one of Gadhafi's sons is reportedly attacking the rebel-held city of Zawiyah from six directions as the oppostion fights back. And there are reports that Gadhafi's troops have massed near the Tunisian border, apparently to take back border crossings now in opposition hands.